/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
Gets the major tab for the manager
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SDockTab](API\Runtime\Slate\Widgets\Docking\SDockTab) > GetMajorTabForTabManager ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FTabManager](API\Runtime\Slate\Framework\Docking\FTabManager) > & ChildManager )